Pres Obama's NSA adviser Blinken: Next round of sanctions to target Russia's defense minitry and companies close to Putin; Will not agree to Ukraine request for military assistance - press - "Starting this week, in coordination with our allies and partners, we'll be exerting additional pressure on the people closest to him (Putin), the companies they control, the defense industry... We could send weapons to Ukraine. It wouldn't make a difference in terms of their ability to stand up to the Russians."